Drill sharpener.



W. A. SMITH.

DRILL SHARPENER,

APPLICATION men SEPT.Z7| 1916,

Patented July 17, 1917.

2 SHEETSSHEET l- W. A. SMITH.

DRILL SHARPENER.

APPLICATION FILED SEPT-27.19%

Patented. Jul 17', 1917.

2 SHEETS SHEET 2.

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WILLIAM A. SMITH, OF DENVER, COLORADO, ASSIGNOR TO THE DENVER ROCK DRILL MANUFACTURING COMPANY, OF DENVER, COLORADO, A CORPORATION OF DELA- WARE.

DRILL-SHARPENER.

Specification of Letters Patent.

Patented July 17, 1917.

Application filed September 27, 1916. Serial No; 122,526.

To all whom it may concern: 1

Be it known that I, WILLIAM A. SMITH,

. of Colorado, have invented certain new andv useful Improvements in DrillsSharpeners, of which the following is a specification.

The present invention relates to drill sharpening apparatus, especially that type employing motive fluid for actuating the elements.

It is theprimary object of the present invention to provide a very compact and relatively simple apparatus that is entirely.

practical, and while'more especially useful for small plants, is of coursenot restricted to such use.

An embodiment of the invention is illustrated in the accompanying drawings, wherein i Figure 1 is a side elevation of the apparatus, portionsthereof being shown in section.

Fig. 2' is a rear elevation of the same. 7

Fig. 3 isa detail vertical sectional view through the controlling 'valvei mechanism.

Fig. 4 is a detail elevation showing the disposition of the vise elements when said vise is closed.

Fig. 5 is a detail sectional view on the line 55 of Fig. 1.

Similar reference numerals designate cor responding parts in all the figures ofthe drawings.

In the embodiment disclosed, a base S is employed that mayloesupported on suitable legs 9, and is provided at one side of its center, and 1n efiect 1n one corner, with an in.

tegral hollow standard 10 terminating in ears 11. Fulcrumed" in said ears is a lever 12-, one arm 13 of which extends beyond the" standard and overhangs a portion ofthe" base, the other arm 14 overhanging a platform 15 formed upon the standard. This platform is provided with a suitable seat 16 to receive a vise orclamping die 17 and the arm 14'of the lever is provided with a corresponding seat 18carrying a coacting die 19. Coacting cutting or shaping dies 20 mayalso be 'mounted on the lever arm 14 andplatform 15, as will be readily understood by thoseskilled in'theartu The'free end of the arm 13 of thelever 12" is disposed above a vertical" cylinder ;.21 lo-' cated on the base 8 at one'side of the'stand justably mounted on this rod 25 by means of a sultable clamp 28, is a pneumatic hamany suitable source. connected thereto a branch 41 that in turn aid 10, and in this cylinder is arranged a reclprocatory piston 22 to which is connected a piston rod 23 having a connection 24 with thefree end of the lever 13. The weight of the piston 22, the piston rod 23 and the arm l3fof the lever is greater than the other arm 14- with the parts carried thereby, so that the normal position of the parts is as illustrated in Fig. 2.

Extending rearwardly from the upper portion of the "standard 10 is a horizontal rod 25 having a reduced stem 26 that slidably passes through said standard and has a nut 27 threaded upon its free end. Ad-

mer preferably of the valveless type, and comprising a cylinder 29 within which operates a piston 30. It is believed to be unnecessary to describe the structure and operation'of this hammer in detail. Mounted upon the end thereof, adjacent to the standard 10, and thus interposed between said hammer and the stem, is a dolly carrier comprising a sleeve 31, said sleeve having a bore 322 and an enlarged chamber 33 in its rear portion. A dolly 34 is slidably mounted in the holder and has a head 35 cooperating with the vise, or in other words, so disposed that it will operate on a drill bit clamped in said vise. The rear portion of the dolly projects into the chamber 33 and has an abutment flange .36 arranged to engage a stop 37 located in the chamber 33. A piston bore 38 is formed in the dolly holder at one side of the bore 32, and. operating therein is a piston 39 that bears against the abutment 36 on the side opposite. to that which engages the stop.

A portion of the supply pipe for the motive fluid is shown at 40, and leads from This supply pipe has' its rear-most position. However, the dolly when struck by the hammer piston 30 will operate against the piston 39, and be driven forwardly.

The supply pipe 40 is connected with a casing 43in whicha plunger valve 44 opermotive fluid supply channel 45, and the up;

per end of the valve has a link connection 54 with the crank arm 55 of a rock shaft 56.

This shaft is journaled in the rear side of the standard 10 as shown at, 57, and has a handlecrank 58.at one end, in convenient reach of the operator. A coiled spring 59 surrounding theshaft and connected thereto as illustrated at 60 bears against the adjacent journal box 57 and acts to frictionally hold the valve 44 in any desired position. The movement of said shaft is limited by a pin-61 operating ina cut away portion 62 of one of the journal boxes 57.

Itis believed that the operation of the apparatus will be readily understood by those skilled in the art. -\Vith the parts as .shown in the drawings, the apparatus. is at a standstill. If now a tool to beoperated upon is introduced into the vise between the dies 17 and 19- and the handle crank is turned rearwardly, the piston valve 44 will .be moved upwardly. It will be recalled that the fluidunder pressure is inthe lowermost channel 45 ofthe valve casing 43 and as the valve 44 moves upwardly. the upper head53 thereof will cross the next channel 46. Thiswill bring said channel intozcommunication with the channel 45, and consequently the fluid will pass through the pipe 47' intoi the lower end. of the cylinder 21, the piston 22 therein will be elevated, and the lever 12 swung to close the jaws or dies Hand 19 upon the tool. A further upward movement of the valve 44 carries the upper head 53 above the channel48, so that m0- tive fluid from thechannel 45 can then also pass throughthe pipe 49 to the dolly hammer 29 andcause the actuation thereof. The

' valve 44 is then in its uppermost position tivefluid to the dolly hammer 29 and then and the vise and dolly hammer are both in operation.

head 53 will thereby first cutting ed the supply of moopening it to the exhaust channel 50 and nipple 51. A futher downward movement inlike manner cuts olf the fluid supply'from the vise cylinder'22 and also opens said cylinder to the exhaust channel 50, whereupon'the piston'22 will drop to its own weight and the vise jaws thus be opened.

Upon a retrograde or down-- ward movement of the-valve 44 the upper pass below the channel 48,

it is thought that the construction, operation and many advantages of the herein described invention will be apparent to those skilled in the art, without further description, and it will be understood that various changes in the size, shape, proportion, and minor details of construction, may be resorted to without departing from the scope of the invention as defined by the claims.

Having thus fully described my invention, what. I claim as new, and desire to secure by Letters'Patent, is

1. In apparatus of the character set forth, the combination with a base and a standard rising therefrom, of a vise on the standard including a lever fulcrumed on the standard and having a jaw on one arm thereof, a motor for the lever connected to the other arm of the vise and mounted on the base alongside the standard, a shaping hammer mounted in coacting relation to the vise, means for supplying motive fluid to the inotorand hammer, and means for controlling the motive fluid supply to cause the operations of the vise and hammer in succession.

2. In apparatus of the character set forth, the combination with a base and a standard rising therefrom, of a vise mounted on the standard including a lower stationary jaw and a lever pivoted on the standard and having an upper movable jaw in coaction with the lower jaw, said lever extending beyond the standard over the base, an upright cylinder mounted on the base alongside the standard, a piston in the cylinder having a connection with the overhanging portion of the lever, and a hammer cooperating with the vise.

3. In apparatus of the character setforth, the combination with a vise, of a hammer, mechanism for operating the vise and=hammer, a dolly holder mounted on the hammer and interposed between the hammer and the vise, a dolly slidably mounted in the holder, and a piston in the dolly holder engaged with the dolly.

4. Inapparatus of the character the combination with a vise, of a mechanism for set forth, hammer, operating the vise and ham mer, a dolly holder-mounted on the hammer and having an internal stop, a dolly slidable in the holder and having a projection, one side of which abuts against the stop,'and a piston in the holder bearing against the opposite side of the projection to urge the dolly rearwardly against said stop.

In apparatus of the character set f0rth,'the combination with a vise, of fluid operated actuating means therefor, a fluidoperated dolly hammer, means for supplymg fluid to the actuating means and-hammer, lncluding a piston valve casing having a supply'port, an exhaust port spaced fronr the supply port and distributing ports located between the supply and exhaust ports and respectively communicating with the vise actuating means and dolly hammer, and a piston valve operating in the casing and movable therein to a position to cut off the supply from both distributing ports while leaving both of said distributing ports in communication with the exhaust port and also movable to a position to cut off the exhaust port from both distributing ports while leaving the said distributing ports in communication with said supply port.

6. In apparatus of the character set forth,

7 the combination with a vise, of fluid operated actuating means therefor, a fluid operated dolly hammer, means for supplying fluid to the actuating means and hammer, including a piston valve casing having a supply port at one end portion, an exhaust port at the other end portion, and distributing ports located at spaced points between the supply and exhaust ports and respectively communicating with the vise actuating means and dolly hammer, and a piston valve operating in the casing and including a head movable from a position between the supply port and distributing ports to a position between the exhaust port and distributing ports and vice versa, and during such movement crossing the distributing ports successively.

7 In apparatus of the character set forth, the combination with a vise including a support, of a laterally projecting rod having a reduced stem secured in the vise support, and a dolly hammer mounted on the rod and cooperating with the vise.

8. In apparatus of the character set forth, the combination with a vise including a support having a transverse opening therethrough, of a laterally projecting rod having a reduced stem extending through the opening and having a shoulder abutted against the support, a fastening device on the stem and cooperating with the opposite side of the vise to that abutted against by the shoulder, and a dolly hammer mounted on the rod and cooperating with the vise.

In testimony whereof, I aflix my signature in the presence of two witnesses.

'WILLIAM A. SMITH.

Witnesses:

D. E. STRoUT, JAS. R. ELMENDORF.

Gopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

